A living bdelloid rotifer from 24,000-year-old Arctic permafrost.

Current Biology : CB
Lyubov ShmakovaElizaveta Rivkina

Abstract

In natural, permanently frozen habitats, some organisms may be preserved for hundreds to tens of thousands of years. For example, stems of Antarctic moss were successfully regrown from an over millennium-old sample covered by ice for about 400 years1. Likewise, whole campion plants were regenerated from seed tissue preserved in relict 32,000-year-old permafrost2, and nematodes were revived from the permafrost of two localities in northeastern Siberia, with source sediments dated over 30,000 years BP3. Bdelloid rotifers, microscopic multicellular animals, are known for their ability to survive extremely low temperatures4. Previous reports suggest survival after six to ten years when frozen between -20° to 0°C4-6. Here, we report the survival of an obligate parthenogenetic bdelloid rotifer, recovered from northeastern Siberian permafrost radiocarbon-dated to ∼24,000 years BP. This constitutes the longest reported case of rotifer survival in a frozen state. We confirmed the finding by identifying rotifer actin gene sequences in a metagenome obtained from the same sample. By morphological and molecular markers, the discovered rotifer belongs to the genus Adineta, and aligns with a contemporary Adineta vaga isolate collected in Belg...Continue Reading

References

Feb 23, 2012·Proceedings of the National Academy of Sciences of the United States of America·Svetlana YashinaDavid Gilichinsky
Mar 22, 2014·Current Biology : CB·Esme RoadsPeter Convey
Mar 5, 2016·Molecular Phylogenetics and Evolution·Daniel H ShainEinar Arnason
Jul 17, 2018·Doklady Biological Sciences : Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections·A V ShatilovichE M Rivkina

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